Test you knowledge of fair use in the classroom with this fun 20 question quiz from California State University, Sacramento

Sources for Creative Commons Licensed Images

Wikimedia Commons has images, sounds and videos used by Wikipedia which most often are public domain or under Creative Commons Licenses.
Flickr not only is a site to store personal photos, some people have opened their photos to use by others through Creative Commons Licenses.When searching Google, use Advanced Image Search to limit by "Usage Rights."